Carbureter



T. A. B. RICHARDSON. CARBURETER. APPLICATION FILED um. 12, I911. RENEWED JULY 6. 1920.

Patented Nov. 16, 1920.

3 SHEETSSHEET 1- T. A. B. RICHARDSON. v CARBUBETER- APPLICATION FILED JAN. 12, 1917. RENEWED JULY 6, 1920.

Patented Nov. 16, 1920.

3 SHEETS-SHEET 2.

INVE/VTUR 77/0/10: 7.15. Ecn'flRp-sarr T. A. B. RICHARDSON.

CARBURETER. APPLICATION FILED JAN. I2, 1917- RENEWED JULY 6, 1920- Patented Nov. 16, I920.

3 SHEETS-SHEET 3.

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3141 11 to: 17 M: 16, 4 /007,905 0M UNITED STATES PATENT OFFICE.

THOMAS A. B. RICHARDSON, OF INDIANAPOLIS, INDIANA.

CARBURETER.

Application filed January 12, 1917, Serial No. 142,019. 'Renewed July 6, 1920. Serial No. 394,232.

To all whom it may concern:

Be it known that I, THOMAS A. B. Bron- ARDSON, a citizen of the United States, and a resident of Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Carbureter; and I do hereby declare that the followin is a full, clear. ant exact description thereof, reference being had to the accompanying drawings, in which like letters refer to like parts.

The-object of this invention is to improve the construction and operation of carbure ters so as to increase the atomization of the fuel and its admixture with the air for @car bureting it in definite and accurately adjustable proportions, and to also simplify construction.

The fuel controlling means or valve is cylindrical and rotatably adjustable within the inner wall of the passageway through the carburetor and there is an annular series of fuel inlets in .the wall of the passageway.

through which the column of air moves, and surrounding the column of air and discharging fuel at right angles into the column of air.

Such arrangement provides the carbureter with fuel mixing device of extended capability and provision of operation and effectiveness of fuel injection, and the fuel controlling means and air controlling means simultaneously coact so as .to proportion definitely and accurately the relative amounts of fuel and air and efiect the de sired mixture thereof within the carbureter.

The full nature of this invention will be understood from the accompanying drawings and the following description and claims.

In the drawings F gure 1 1s a s de elevation of the carbureter with-the parts in .op-

I Fig. 2 is alvertical section through the carburetor wall in the same position. Fig. 3 is a horizontal section on line 3-3 of Fig. 2. Fig. 4: is a plan view of the top of the carburetor with parts broken away. Fig. 5 is a vertical s ction through the upper portion of the carbureter on'the line 55 of Fig. 4:,and showing the parts crating position.

.on a large scale. Fig. 6. is a horizontal'section on line .6 6 of Fig. 5. Fig. 7 isaside elevation of the. smaller end of the air passage and fuel valve. lower portion being broken away. Fig. 8 is a sectionon line 88 of Fig. 2.

a portion of the the lower end thereof and a housing 13 secured to the upper end of the fuel chamber housing 10 in position to be secured to the manifoldof the engine. Pivotally secured to the housing 13, in position to be actuated about its axis 14: there is an operating wheel 15 for controlling the fuel and air supply by means of the rod 16 which is secured at one end to the hand or foot throttle not shown here1n and pivoted at its other end to the lever 17 secured to said wheel.

One portion of the wheel is in the form of a pinion 18 while another portion is in the form of a beveled gear 19. The pinion 18 is in position to mesh with the rack 20 which is secured to a rod 21 which is adapted to extend and reciprocate in a bearing 22 seas shown in Fig. 6, by means of an arm 23 extending through the slot 25 in the lower portion of the housing 13. It. therefore, results from this construction, that when the wheel 15 is operated by the rod 16 and the lever 17 it will actuate the rod 21 and the pinion 23 simultaneously for controlling the fuel and air supply to the carbureter as will be hereinafter described in detail.

The fuel is admittedto the carbureter through the valve chamber 31 'within the housing 11, so that it must pass through the screen 32. Located between the valve chamber 31 and the passage 33 there is a Valve opening 3 1 in which a valve 35 is adapted to seat. Said valve has a rod 36 extending upwardly therefrom through the top of the valve housing over which there is a protective housing 37. ,The valve 35 is operated for opening and closing the valve opening admit more fuel theretoand when the chamber is full the valve will close and prevent the fuel from entering, whereby the fuel supply will be regulated.

The fuel is admitted from the fuel chamber 44 through the passage 45 to the intermediate chamber 46 which surrounds the air passage 47. The air passage 47 tapers inwardly toward the center thereof and vided with a plurality of depressions 49' which are positioned so as to register with the slots 50 which surround said sleeve. The fuel entering the carbureter is controlled by the opening 50 by turning the sleeve 24 within the air passage, by means of the segmental pinion and wheel 15. It must, therefore, readily be seen that by turning'the sleeve in one position the opening or slot 50 will be out of registry with the depression 49 so that no fuel will be admitted, while in another position they will be entirely registered with said depression so that the maximum amount of fuel will be admitted. The position may be further varied so as to enlarge or diminish the opening, thereby controlling the fuel supply. By having the fuel enter the air passage around the periphery thereof at its narrowest point it will be understood that more perfect atomization will take place, as the velocity of the air will be greatest at this point and will engage the fuel at right angles. 7

Secured to the lower end of the air passage 47 there is an air valve chamber 50 connected with the air inlet 51. Extending vertically through the housing 12 into the chamber 50 there is an air valve rod 52 hav- 7 ing a valve 53 on the upper end thereof. Said valve is adapted to seat within the downwardly flaring sides of the tapering passage 47 as shown in Fig. 2, the. valve head being provided with a taper at sub stantially the same angle as the sides of the air passage so that the area of the opening will be enlarged as the valve is opened. Therefore the air supply drawn through the inlet 51 and the passage 47 will be controlled by the valve 53, and when it reaches the center of the passage it will obtain its maximum velocity and will be penetrated on all sides by a spray of fuel issuing from the opening 50, and controlled by the operation of the sleeve 24. This will cause the mixture to form during the passage of the air through the carbureter and a mixing chamber is therefore unnecessary, and the maximum efficiency of the carbureter is obtained due to the complete mixing caused by the construction and operation as above set forth. I I

The air valve 53 is controlled through the actuation of the rod 21'which is engaged by pivot pins 55 in its lower end. Said pins are secured on the rod 21 and straddled by the bifurcated lever 56, said lever being pivoted at 57 on a' bracket 58 secured to the lower portion of the housing 12. The other end of the lever 56 is also bifurcatedand in position to straddle and be slidably engaged by the sleeve 59 movably mounted on the collar 61. The collar 61 is internally threaded and adapted to engage the threads on the valve rod 52 and be locked thereon by the lock nut 60. An adjusting nut 62 is screwed on the lower end of the rod for making the adjustment after the collar is unlocked.

The collar 61 is slidably mounted on the forked end of the lever 56. The pivot pin 57, carrying the lever 56, has members 63 attached to the ends thereof which members slide in horizontally disposed slots 64 in the bracket 58 and in order to adjust the lever 56 longitudinally, thereby changingthe fulcrum connection between the pins 55'and the .member 21 and the pivot pins 59 of the sleeve 59, a threadedscrew 65 is secured to one of the members 63, and screw 65 extending through a slotted block 66 carried by one arm of the bracket 58 and cooperating with said screw and positioned'in the slot of said block 66 in a finger piece 67. By rotating the finger piece in one direction the screw 65, together with the lever 56 and the parts carrying the same, will be moved forwardly, thus positioning the fulcrum point between the pivot 59 and the bifurcated arm 56 nearer the pivot pin 57 and the pivot 55 farther away from the pivot point 56, thereby changing the relative positions of the fuel valve and the air valve. It will likewise be seen that by rotating the finger piece in the other direction the pivot pin 57 and the parts carried thereby will be moved outwardly and the fulcrum point between the parts 59 and 56 positioned farther away from the pivot pin 57, thus increasing the movement of the valve 53; By means of this construction not only the valve may be adjusted vertically but the relative position of the valve control mechanism may be adjusted so that the relation of the fuel valve to the air valve may be changed.

The invention claimed is:

1. In a carbureter, a rotatable sleeve for controlling the introduction of fuel, a valve for controllingthe air supply, a segmental pinion attached to the rotatable sleeve, a

rotatable gear structure meshing therewith, means for rotating said gear structure, and means operated by said gear structure for opening or closing the air supply valve in timed relation with the fuel controlling sleeve.

2. In a carbureter, a rotatable fuel controlling sleeve, a segmental pinion connected to the fuel sleeve, a bevel gear for operating said segmental pinion for rotating said fuel sleeve, a pinion integral With said bevel gear, an air controlling valve, a pivotally mounted lever for operating sald air valve, a rod connected to one end of said lever, and a rack on said rod for engagement with said pinion for operating said air valve in timed relation with said fuel sleeve.

3. In a carbureter, a rotatable fuel controlling sleeve, a segmental pinion connected to the fuel sleeve, a bevel gear for operating said segmental pinion for rotating said fuel sleeve, a pinion integral with said bevel gear, an air controlling valve, a lever pivotally mounted on said carbureter, said lever having bifurcated ends, pivot pins on said air valve for engagement with one of the bifurcated ends of the lever, a rod, pivot pins on said rod for cooperation with the opposite end of said lever, means for adjusting said lever longitudinally to vary the stroke of said air valve, and a rack on said rod for engagement with said pinion for operating said air valve in timed relation with said fuel sleeve.

4:. In a carbureter, a rotatable fuel sleeve, a segmental pinion attached thereto, an air valve, a stem on said air valve, the lower end of said stem being threaded, a collar thread- 9 ed onto said stem, a pivoted lever having both of its ends bifurcated, pins on said collar for engagement with one bifurcated end of the lever, an operating rod at the opposite end of said lever, pins on said rod for engagement with the bifurcated end of the lever, a rack on said rod, and a combined gear and pinion adapted to cooperate respectively with the segmental pinion and rack for simultaneously operating the fuel valve and air sleeve.

In witness whereof I have hereunto aflixed my signature.

THOMAS A. B. RICHARDSON. 

